Pipe-bending machine.



B. W. TUCKER & T. P. OEGHSLE.

PIPE BENDING MACHINE.

APPLICATION rILnn JULY 15, 1909 Patented Dec. 27, 1910.

1'7 SHEETS-BEBE! 1.

B. WLTUCKB-R & T. I. OEGHSLE.

- PIPE BENDING MACHINE.

APPLIOATIOH nun JULY 15, 1909 79,724, Patented Dec. 27, 1910.

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Patented Dec. 27, 1910.

1'1 SHEETS-B8B 3.

B. W. TUCKER & T. F. OEGHSL E. PIPE'BENDING MACHINE.

APPLIOATION FILED JULY 16, 1909 la mliomuaqs B. W. TUCKER & T. F. OEGHSLE.

PIPE BENDING MACHINE.

APPLICATION I'ILED JULY 15, 1909 Patented Dec. 27, 1910.

- 17 SHEETB8KBBT 4.

B. W. TUCKER & T. F. OEGHSLE.

PIPE BENDING MACHINE.

APPLICATION FILED JULY 15, 1909 Patented Dec.27,1910.

17 SHEETS-SHEET 5.

IIIIIfl B. W. TUCKER & TI F. OBGHSLE.

PIPE BENDING MACHINE.

APPLICATION FILED JULY 15, 1909 Patented Dec.27, 1910.

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B. W. TUCKER & T. P. OECHSLE.

PIPE BENDING MACHINE.

APPLIOATION FILED JULY 15 1909 wit we so es:

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1'7 SHEETS-SHEET 7.

B. W. TUCKER & T. P. OBCHSLE.

' PIPE BENDING MACHINE Patented De0.27,1910.

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APPLICATION FILED JULY 15, 1909 1. g k222i, Q Q Q.

wane one? I I B. W. TUCKER & T. F. OEOHSLE.

PIPE BENDING MACHINE.

APPLICATION FILED JULY 16, 1909 Patented Dec. 27, 1910.

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B. W. TUCKER & T. F. OEGHSLE.

PIPE BENDING MACHINE. APPLICATION FILED JULY 15, 1909 Patnted Dec. 27, 1910.

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, witnesses B. w. TUCKER & T. F. OEGHSLE.

PIPE BENDING MACHINE.

APPLICATION FILE!) JULY 15,1909

Patented Dec. 27, 1910.

17 SHEETS-SHEET 11.

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APPLIOATIOH Hum JULY 15, 1909 979,724. Patented Dec. 27. 1910.

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PIPE BBNDING MACHINE.

APPLICATION FILED JULY 15, 1909 Pa tented Dec.27,1910.

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9561mm W5 1 3. 8. Dumb,

B. W. TUCKER & T. F. OECHSLE.

PIPE BENDING MACHINE. APPLIOATIOH TILED JULY 15, 1909 Patented Dc.27, 1910.

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QWi/twzooeo B. W. TUCKER & T. F. OEGHSLE. PIPE BENDING MACHINE. APPLICATION FILED JULY 16, 1909 979,724. Patented Dec.27, 1910.

17 SHEETS-SHEET 15.

B. W. TUCKER & T. F. OEGHSLE.

m1: mmnnw MACHINE. APPLICATION FILED JULY 15, 1909 Patented Dec.27,1910.

17 SHEETS-SHEET 16.

\NN T n QX i/Mw was B. W. TUCKER & T. F. OEGHSLE.

PIPE BENDING MACHINE. APPLICATION FILED JULY 15, 1909 Patented Dec. 27, 1910.

TT' EE BENJAMIN W. TUCKER, OF SOUTH ORANGE, NEW JERSEY,'AND THEODORE F. OECHSLE,

0F PHILADELPHIA, PENNSYLVANIA.

'PIPE-BENDING MACHINE.

Specification of Letters Patent.

Application filed July 15, 1909. Serial No. 507,694.

1 '0 all whom it may concern:

Be it known that we, BENJAMIN W'. TUCKER and Tnnononn F. ()EcHsLE, citizens of the United States, and residents of South Orange, county of. Essex, and State of New Jersey. and Philadelphia, county of Philadelphia, and State of Pennsylvania, respectively, have invented certain new and useful Improvements in Pipe-Bending Machines, of which the following is a full,'clear, and exact description.

This invention relates more particularly to a machine for bending sheet metal to form elbows of any desired angle.

The primary object of the invention is to provide a simple and elfectiv'e machine in which av tubular sheet metah body niay'be placed, and the said body formed with one or more crimps as a part thereof to adapt the body to be bent at an angle, and the said angle varied according to the number of crimps formed in the body.

()ther objects of the invention are to provide simple means for effectively and positively gripping the tubular body or blank so as to properly move the same in the machine while the blank is being bent; to provide simple means for. moving the grip ping device or chuck; to provide a simple die to assist in forming the crimps; to provide simple means for initially forming a rib before the crimped part is caused to overlap the body portion of the pipe or elbow; to provide simple means for controlling and moving the members of the die; and to provide means whereby the elbow or pipe while being bent will be held so that its proper shape shall be retained.

A further object of the invention is to provide a machine which will be very rapid in its movement, and whichwill be entirely automatic after the blank in a tubular form is placed in the machine.

With these and otherobjects in view, the invention .will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a side elevation, partly broken away, of one form of machine embodying our invention. I F 1g. 2 is a plan view, showing a part of the front and rear of the machine broken away. Fig. 3 is a front elevation of the machine, showing parts thereof broken away. Fig. 4 is a transverse section, taken on the line IVIV of Figs. 1 and 2. Fig. 5 is a longitudinal section, taken on the line VV of Fig. 2. igs. 6 to 8 are views showing one form of clutch for starting or stopping the machine. Fig. 9 is a plan view, partly in section, and Fig. 10 is a detail elevation of a part of the Geneva movement, respectively, employed in connection with operating the blank gripplng device or chuck. Fig. 11 is a plan view, partly broken away, of one form of one of the cams for moving the blank or tube chuck and which cams are operated by the mechanism shown in Figs. 9 and 10. Fig. 12 is an elevation of one of the cams for operating the gripping chuck. Fig. 13 is a detail perspective View of one of the cam toes for moving the chuck while forming the crimps. Fig. 14 shows a art of the connection for operating the tuliie gripping chuck. Fig. 15 is an enlarged fragmentary section of the chuck operating cam. Fig. 16 is a front elevation of the sleeve or mandrel serving as a guiding means for the grippin chuck, and also to initially support and guide the tube to be bent. Fig. 17 is a detail view, partly broken away, of the mandrel on which the body to be crim ed is initially placed. Fig. 18 is a sectionaFview, taken on the line XVIIIXVIII of Fig. 17. Fig. 19 is a transverse section, taken on the line XIX-XIX of Fig. 17. Fig. 20 is a rear elevation of the mandrel. Fig. 21 is a front elevation of the chuck and the mandrel, showing how the gripping chuck is adapted to be made to engage and properly hold the pipe to be crimped. Fig. 22 is a longitudinal section, taken on the line XXIIEXXII of Fig. 21. Figs. 23 to 26 are certain details of the chuck. Fig. 27 is a part of the operating mechanism of the chuck. Figs. 28 to 33 are other detail views of parts of the chuck. Fig. 34 is a detail front elevation, partly in section, showing the means for moving-the dies. Fig. 35 is a side elevation of the mechanismshown in Fig. 34. Fig.

Patented Dec. 27, 19m.

36 is an enlarged view of the dies, showing the same in an open position, and with the tube ready to be forced forward. Fig. 37.

shows the die in a closed position when the crimp is rolled and the tube advanced to force the crimp intothe die also to ress' or wiper which moves within the. tubular blank. Fig.. 40 is an elevation, partly" broken away and partly in section, of the de vice shown in Fig. 39. Fig. 41 is an end elevation of the'head of the device or wiper shown'in Figs. 39-and- 40. Fig. 42 is a section taken on the line XLIIXLII of Fig. 40. Fig. 43 is an enlarged end elevation of the wiper; Fig. 44 isan enlarged section of the die, wiper and rolling device, vshowing the wlper moving outward at the start of the machine. Fig; 45 is a view similar to Fig. 44 except that the parts are in a different position. Fig. 46 is a detail View of one of the die members in position to receive the initial rib to complete the crimp. Fig. 47 shows how the inner pivoted die members may swing outward to conform to the movement of the tube or blank while being bent. Fig. 48 shows the inner pivoted die members in their normal position but the die opened to allow for the feed of the tube forward for next crimp. Fig. 49 is a sectional plan view, taken on the line XLIX'-XLIX of Fig. 45. Figs. 50 to 58 show the various steps in forming an elbow, the angle of which is varied according to the number of crimps.

The invention is shown as particularly adapted for bending tubes or pipes of sheet metal adapted for use in connection with building or other purposes, and the said bending is effected by forming one or more crimps in the metal according to the angle to which the metal is to be bent, such as when forming elbows, and while the invention is shown as constructed in a particular way to form the crimps and bend the tubular blank, certain features of the machine and.the construction thereof may be changed according to the requirements of the particular article to be manufactured.

The frame 10 may be of any suitable construction and intermediate the front and rear thereof is an extended bearing 11 having a cap 12 secured thereto by bolts or otherwise, and held in said bearing is a tubular sleeve, device or mandrel 13 which is held by a key 14 or otherwise in the bear ing 11 against rotation. The bearing is long enough 'to give a proper support to the mandrel 13, and this mandrel extends forward so as to overhang the forward portion of the machine, and slidingly held on said mandrel 13 is a chuck or gripping'device 15. This chuck 15 may be of any suitable construction and may be made to hold and grip the tube in any desired way, and said chuck is adapted to hold the tube or blank at its end and to move the same properly throughout the formation of the crimps and the bending of the tubes. The tube or blankof the desired length is passed inwards'o'that the mandrel 13 will properly support the same until the e ge-- of the tube or blank res ts against the face or' side of one of the chuck jaws, as 16 Fig. 22. The mandrel 13, Figs. 5 and 16 to 20, is constructed to guide and support the tube and has an opening 17 therethrough to make the same tubular and is provided with spaced supporting bars 18 and l 9. There are three bars 19 which are adapted to engage the inner surface of the blank and there are three guiding bars 18 spaced about the periphery of the body portion 20 of the mandrel, and these bars 18 com rise two members 21 and 22 which are s otted or separated by a space, as 23, for the blank to fit therein according to the length of the blank. The bars 18 are held tothe mandrel at the rear by the screws or bolts 24, and

body 20 at the outer end by a screw 25 while the outer members oi bars 22 are each connected and supported at their outer ends by a ring orannular member 26 which is secured to the bars by means of screws 27 or otherwise.- The blank will thus be properly supported in order to hold it in its proper shape during the bending and crimping operation.

The chuck 15 is substantially the same in construction as that of the ordinary form of three-j awed universal chuck, except that the said chuck has each jaw formed of two opposed gripping members which are operated in such a way as to cause the same to move toward each other and thereby grip the blankv positively and without liability of the same slipping. As shown the chuck, Figs. 21 to 33, comprises a head or casing 28, and this head is slidingly held (in the mandrel 13. The head 28- is provided with ,a cap plate or member 29 WlllCh is secured the inner members 21 are secured to the thereto by screws 30 orotherwise, and in the rotary element 31, and-this element has i ribs which are uided in opposed annular grooves in the ange and cap plate jof'the' I head so as to be rotatable therein, and said rotary element 31 has teethon'the' outer" surface thereof fora part of its periphery which is adapted to be engagedby the teeth ofa pinion 32 secured to theshaft'33, the

latter being held to rock in the head 28 and.

on the end of the shaft is an operating handle 34 by which the element 31 may be rotated. The element 31'has a spiral tooth or teeth 35 on its opposite faces and these teeth areadapted to engage spiral teeth in the jaws 35'and 36. There area plurality of these jaws, in this case three, and the jaws are arranged in sets, the jaws of one set, as 36, being adapted to fit on the outside of the blank, and the jaws 35 of the other set being adapted to engage the inside portion, the latter jaws being provided with an angular part, as 37, so. that when the element 31 1s rotated by the movement of the handle 34, the two sets of jaws will be forced toward each other to grip the tubular blank. The jaws are suitably guided in the head to move radially and the outer jaws are spaced far enough apart to not interfere with the supporting bars or members of the mandrel 13, and the inner jaws are cut away substantially centrally thereof to fit about the supporting bars or members 19 of the mandrel.

The head 28 is provided with a lug 38,

and this lug 38 has a rod 39 secured there to at one end. The rod 39 is guided in the end 40 of a cylinder 41, and is connected to a chain 42 which passes about a pulley 43 located on a shaft 44, and this chain may be secured at one end to a spring 45, the said spring tending normally to force the chuck 15 rearwardly along the mandrel 13. A collar 46 issecured to the rod 39 and this collar is adapted to engage a plunger 47 which is movably held .in the cylinder 41 and is normally forced in one direction by means of a spring 48, the latter being of sufficient tension to restore the plunger or piston 47 to its former position. The piston 47 may fit substantially tight withinthe cylinder 41 and in the cylinder at one end thereof is an opening 49 which is controlled by the petcock 50, and this petcock may be open to any desired extent to control the degree with which the air from the cylinder 41 may be forced therethrough. As will be seen when the spring 45 forces the chuck 15 rearwardly, the plunger 47 will take the impact of the collar 46, and by reason of the air within the cylinder 41, will cushion the backward movement of the chuck and the tube carried thereby.

A yoke or rod 51 is pivotally held at 52 to each side of the chuck 15 and this yoke, Figs. 1, 2, 5 and 27, has an enlarged end 53 which is slotted, asat 54, and in this slotted end is a bearing 55 which is adapted to fit about a shaft 44 serving to guide the yokes or rods 51 during the movement of the chuck 15, and the bifurcated end formed by the slot 54 may be closed by a cap-piece 56. Each yoke or rod 51 carries a trundle 57 which is adapted to move in cam grooves 58 of cams 59 which are held to rotate with the shaft 44. These cams 59 serve to position the tubular blank during the erin'iping operation and also serve to force the metal in the die to telescope or force a part of the metal over the body of the tube, and said cams are rotated through a Geneva movc-' ment 60, Figs. 2, 9 to 13. T1115 Geneva movement has-a wheel member 61 secured to the cam shaft 44, and said wheel memher or element 61, has radially slotted por tions 62 which are adapted tobe engaged.

and said arm 63 is secured to a shaft 64 which also carries a locking element 65 to engage recessed portions in the element 61 serving to lock and hold the wheel 61 stationary when the latter is not to be moved by the arm 63. The shaft 64 serves as the main drive shaft and on one end of said shaft is a gear 66 which is in mesh with a smaller gear 67 movable independently of the cam shaft 44,- and adapted to rotate the gear 67 is a pulley 68 whereby the cams may be positively driven with a step-by-step movement as the pulley is operated. As the cams are rotated, the parts 69 of the cam grooves are brought in line with the trundles or rollers carried by the rods 51 for operating the chuck, and this will permitt-he spring or springs 45 to force the chuck quickly rearward, and this places the blank about' '73 is rigidly held to the spindle or shaft 70 at the forward part thereof by means of a set screw or otherwise, and is adapted, when rotated, to force a part of the metal outward into the die 74 to form a rib thereon corresponding to the shape of said device, and held in the path of movement of the device 73 is a die 74.

The die 74, Figs. 5, 34 to 38, and 44 and 45, COIIIPI'lSOS two laterally movable parts or outer members 75 and 76 which are provided with a cut away portion, as 77, corresponding to the rib or bulged portion when therlatter is rolled by the rotary movement of the device 73, as shown best in Fig. 51, and after the device has been moved from the.position shown in Fig. 44 to that shown in Fig. 45. The outer end of the spindle 70 is provided with a pinion 78, and this pinion is adapted to be rotated by a segmental gear 79 forming an element of a modified form of Geneva movement, and this wheel has a locking rib or part 80 which is adapted to engage a wheel or disk 81 located adjacent to the pinion 7 8 and attached thereto so that the spindle 70 may be given a single rotation and then locked for the rest of the 

